Zebralight SC600 Mark II 900 Lumen Cool White LED Flashlight Battery: One 18650 size (up to 68mm long) 3.6/3.7V Li-ion rechargeable battery. Batteries are not included in the package. Waterproof to IPX7 (2 meters, 30 minutes) Precision machined unibody casing from premium grade aluminum Smart user interface provides fast and easy access to all brightness levels Removable Pocket clip